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Samantha and Meghan's father Thomas Markle made headlines earlier this year when he pulled out of the Duchess of Sussex's wedding to Prince Harry.

Samantha regularly speaks about her strained relationship with Meghan and publicly begs her sister to contact their father.

Meghan has kept silent over the issues, but Samantha is hoping to meet with her, marking the first time she has spoken to her sister in a decade.

Samantha Markle (Image: Getty)

Before she arrived in London, Samantha's publicist tweeted about why the American was flying to the UK.

He wrote: "Samantha Markle is coming to the UK. After making numerous attempts in private to arrange a one on one meeting with The Duchess of Sussex to discuss their 74 year old father’s health, Kensington Palace have refused to respond.